ARUP's Laboratory Test Directory
| 0050462: Coxiella burnetii (Q-Fever) Antibody IgG, Phase I & II by IFA |
| Test Mnemonic: Q-F 1,2 | |
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Methodology: Indirect Fluorescent Antibody
Performed: Tue, Fri Reported: 1-5 days |
| Specimen Required: | |
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Collect: One 4 mL SST.
Transport: 1 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.15 mL serum at 2-8°C. Remarks: Separate serum from cells ASAP. Acute and convalescent specimens should be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Please mark specimen plainly as "acute" and "convalescent." Unacceptable Conditions: Severely lipemic, hemolyzed, or contaminated specimens. Stability: After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) |
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| Reference Interval: |
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Phase I: < 1:16 No antibody detected. Phase II: < 1:16 No antibody detected. |
| Interpretive Data: | |
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Single phase II IgG titers of 1:256 and greater are considered evidence of C. burnetii infection at some time prior to the date of the serum specimen. Phase I antibody titers of 1:16 and greater are consistent with chronic infection or convalescent phase of Q-fever.
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| CPT Code(s): | |
| 86638 Q-Fever Phase I; 86638 Q-Fever Phase II |